package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import nonapi.io.github.classgraph.utils.Join;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {


    //切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut(){}


    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段自动填充。。");
    //    获取当前拦截到的方法数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//方法签名对象
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);//获得方法上的注解对象
        OperationType value = annotation.value();//获得数据库操作类型
        //    获取当前拦截到的方法的参数——实体对象

        Object[] args = joinPoint.getArgs();
        if (args == null || args.length==0){
            return;
        }
        Object arg = args[0];


        //    准备赋值的数据

        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        if (value == OperationType.INSERT){
        //  为四个字段赋值
            try {
                Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

            //    通过反射机制为对象属性赋值
                setCreateUser.invoke(arg,currentId);
                setCreateTime.invoke(arg,now);
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);

            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
                throw new RuntimeException(e);
            }
        }else if (value == OperationType.UPDATE){

        //    为两个字段赋值
            try {

                Method setUpdateTime = arg.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod("setUpdateUser", Long.class);

                //    通过反射机制为对象属性赋值

                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);

            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
                throw new RuntimeException(e);
            }

        }

    //    根据当前不同的操作类型为对应的属性通过反射来赋值

    }

}
